
#include <AllShengMedical.h>

#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <termios.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <android/log.h>


#define LOG_TAG "wenqg"
static const char *TAG="wenqg";
#define LOGI(fmt, args...) __android_log_print(ANDROID_LOG_INFO,  TAG, fmt, ##args)
#define LOGD(fmt, args...) __android_log_print(ANDROID_LOG_DEBUG, TAG, fmt, ##args)
#define LOGE(fmt, args...) __android_log_print(ANDROID_LOG_ERROR, TAG, fmt, ##args)

//static char s_string[] = "My god, I did it!";
//#define  CMSPAR 010000000000
//int fd_port = -1;

//jstring Java_com_example_ndk001_JNIInterface_stringFromJNI( JNIEnv* env, jobject thiz )
//{
//
//       LOGI("MyJNI is called!");
//
//      // return (*env)->NewStringUTF(env, s_string);
//       return env->NewStringUTF(s_string);
//}

static speed_t getBaudrate(jint baudrate)
{
	switch(baudrate) {
	case 0: return B0;
	case 50: return B50;
	case 75: return B75;
	case 110: return B110;
	case 134: return B134;
	case 150: return B150;
	case 200: return B200;
	case 300: return B300;
	case 600: return B600;
	case 1200: return B1200;
	case 1800: return B1800;
	case 2400: return B2400;
	case 4800: return B4800;
	case 9600: return B9600;
	case 19200: return B19200;
	case 38400: return B38400;
	case 57600: return B57600;
	case 115200: return B115200;
	case 230400: return B230400;
	case 460800: return B460800;
	case 500000: return B500000;
	case 576000: return B576000;
	case 921600: return B921600;
	case 1000000: return B1000000;
	case 1152000: return B1152000;
	case 1500000: return B1500000;
	case 2000000: return B2000000;
	case 2500000: return B2500000;
	case 3000000: return B3000000;
	case 3500000: return B3500000;
	case 4000000: return B4000000;
	default: return -1;
	}
}


jobject  Java_com_allsheng_serial_SerialPort_open(JNIEnv *env, jclass thiz, jstring path, jint baudrate, jint flags)
{
	int fd_port;
	speed_t speed;
	jobject mFileDescriptor;

	/* Check arguments */
	{
		speed = getBaudrate(baudrate);
		if (speed == -1) {
			/* TODO: throw an exception */
			LOGE("Invalid baudrate");
			return NULL;
		}
	}

	/* Opening device */
	{
		jboolean iscopy;
		const char *path_utf = env->GetStringUTFChars(path, &iscopy);
//		LOGD("Opening serial port %s with flags 0x%x", path_utf, O_RDWR | flags);
		fd_port = open(path_utf, O_RDWR);
//		LOGD("open() fd = %d", fd_port);
		env->ReleaseStringUTFChars(path, path_utf);
		if (fd_port == -1)
		{
			/* Throw an exception */
			LOGE("Cannot open port");
			/* TODO: throw an exception */
			return NULL;
		}
	}

	/* Configure device */
	{
		struct termios cfg;
//		LOGD("Configuring serial port");
		if (tcgetattr(fd_port, &cfg))
		{
			LOGE("tcgetattr() failed");
			close(fd_port);
			/* TODO: throw an exception */
			return NULL;
		}

		cfmakeraw(&cfg);
		cfsetispeed(&cfg, speed);
		cfsetospeed(&cfg, speed);

		cfg.c_cflag &= ~PARENB;
		cfg.c_cflag &= ~CSTOPB;
		cfg.c_cflag &= ~CSIZE;
		cfg.c_cflag |= CS8;


		if (tcsetattr(fd_port, TCSANOW, &cfg))
		{
			LOGE("tcsetattr() failed");
			close(fd_port);
			/* TODO: throw an exception */
			return NULL;
		}
	}

	/* Create a corresponding file descriptor */
	{
		jclass cFileDescriptor = env->FindClass( "java/io/FileDescriptor");
		jmethodID iFileDescriptor = env->GetMethodID(cFileDescriptor, "<init>", "()V");
		jfieldID descriptorID = env->GetFieldID( cFileDescriptor, "descriptor", "I");
		mFileDescriptor = env->NewObject(cFileDescriptor, iFileDescriptor);
		env->SetIntField(mFileDescriptor, descriptorID, (jint)fd_port);
	}

	return mFileDescriptor;
}

/*
 * Class:     cedric_serial_SerialPort
 * Method:    close
 * Signature: ()V
 */
void  Java_com_allsheng_serial_SerialPort_close(JNIEnv *env, jobject thiz)
{
	jclass SerialPortClass = env->GetObjectClass(thiz);
	jclass FileDescriptorClass = env->FindClass( "java/io/FileDescriptor");

	jfieldID mFdID = env->GetFieldID(SerialPortClass, "mFd", "Ljava/io/FileDescriptor;");
	jfieldID descriptorID = env->GetFieldID(FileDescriptorClass, "descriptor", "I");

	jobject mFd = env->GetObjectField(thiz, mFdID);
	jint descriptor = env->GetIntField(mFd, descriptorID);

	LOGD("close(fd = %d)", descriptor);
	close(descriptor);
}
